40 Questions
What is the main purpose of negative feedback mechanisms in homeostasis?
To maintain internal stability despite external changes
How do high glucose levels affect blood sugar regulation?
They facilitate glucose absorption by cells
What is the role of thyroxin in the body's functions?
Regulating metabolism and energy generation
Which gland secretes thyroxin in the body?
Thyroid gland
How does negative feedback maintain metabolic balance concerning thyroxin levels?
An increase in TSH decreases thyroxin production
What is the role of Aldosterone in salt balance?
Regulates sodium and potassium levels
Which gland is responsible for adjusting ADH secretion in response to blood osmolarity changes?
Pituitary gland
What is the main function of Antidiuretic Hormone (ADH) in the body?
Adjusts kidney water reabsorption
Which mechanism is involved in cooling the body in response to heat?
Vasoconstriction and shivering
What can lead to Goitre according to the text?
Thyroxin imbalance due to iodine deficiency
What is the main function of insulin in regulating blood glucose levels?
Facilitating glucose absorption by cells
How does negative feedback maintain blood glucose levels when they are high?
Prompts insulin release
Which hormone is responsible for converting liver glycogen into glucose when blood sugar is low?
Glucagon
What role do the hypothalamus and pituitary gland play in regulating thyroxin levels?
Monitor and control through TSH
In body temperature regulation, what occurs when the body detects an imbalance?
Initiates a response to correct the imbalance
How does negative feedback maintain homeostasis in response to high blood glucose levels?
Prompts insulin release
What is the primary function of glucagon in regulating blood glucose levels?
Stimulating liver glycogen conversion into glucose
What is the primary function of Aldosterone in salt balance?
Triggers potassium excretion and sodium retention in the kidneys
How does the body respond to high blood sodium levels?
Increased kidney sodium reabsorption
Why is maintaining a core body temperature crucial for enzymatic processes?
To prevent enzyme denaturation due to extreme temperatures
What is the main role of chemoreceptors in blood pH regulation?
Monitoring carbon dioxide levels
Which gland is primarily responsible for adjusting ADH secretion based on blood osmolarity changes?
Pituitary gland
What triggers increased breathing rate and depth in response to low blood pH?
High carbon dioxide levels
What can lead to disorders like diabetes mellitus according to the text?
Failure of glucose regulation
In thermoregulation, what mechanism is responsible for conserving heat in cold conditions?
'Vasoconstriction and shivering'
What is the primary function of the hypothalamus and pituitary gland in regulating thyroxin levels?
Monitoring and controlling thyroxin levels through TSH release
Which hormone is responsible for lowering blood sugar by facilitating glucose absorption by cells?
Insulin
What is the main function of glucagon in regulating blood glucose levels?
Converting liver glycogen into glucose
How does negative feedback maintain homeostasis regarding blood glucose levels?
By releasing insulin when glucose levels are low and glucagon when levels are high
What triggers the release of insulin in response to high blood sugar levels?
High glucose levels
Which mechanism is involved in maintaining metabolic balance concerning thyroxin levels?
Regulation of TSH release
How do low glucose levels affect blood sugar regulation?
Activating the conversion of liver glycogen into glucose
Which hormone is primarily responsible for regulating kidney water reabsorption to maintain blood water levels?
ADH
What is the main consequence of low blood sodium triggering aldosterone release in the body?
Increased potassium excretion
In thermoregulation, which of the following mechanisms plays a role in cooling the body down?
Vasodilation and sweating
What is the main function of the hypothalamus in maintaining homeostasis?
Detecting changes in blood osmolarity
How do chemoreceptors contribute to blood pH regulation?
By signaling for increased breathing rate and depth
What is the primary consequence of aldosterone release due to low blood sodium?
Increased potassium excretion
In response to high CO2 levels affecting blood pH, what occurs in the body to restore pH balance?
Increased sweating
What is the primary role of the skin in thermoregulation?
Assisting in cooling the body down
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